Steam-superheating apparatus for locomotive-boilers.



. J. PMMROSB. STEAM SUPERHEATING APPARATUS FOR LOCOMOTIVES BOILERS.

APPLIGATIO'N FILED DE0.22,1909v 1,660,859., Patented Apr. 29, 1913.

5 vwa ntoz subject of the King of Great Britain,

Dansville, in the county of Liv- I ingston and State of New York, have invented certain new and useful Improve. ments in Steam-Superheating Apparatus: for LocomotiveBoilers, of which the :t ol-, lowing is a full, clear, and exact descrip JOHN JPRIMBOSE. 0F DANSVILLE, NEW YORK.

STEAM-SUFERHEATING APPARATUS FOR LOCOMOTXVE-BOILERS.

specification of Letters Patent.

Patented Apr. 29, 913.

Application med December a, race. Serial no. se4,ae7.

To all whom it may concern Be it known that I, JOHN PnIMnosn, a

siding at tion.

any, impairment of the draft.

To this and other erds the invention con-' sists in the novel features of construction, and combinations of elements hereinafterf described. chamber and each having-arc-shaped inlet A convenient and efiective embodiment of the invention is illustrated in the annexed drawing, in which" Figure 1 1s a sectional front elevation,

' showing the superheater located in the Fig. 2 is a;

smok'e-box of the locomotive. longitudinal section on hne 2-2.

The hot furnace-gases are discharged} from the boiler tubes 3 into the smoke-box 4 and are discharged into the atmosphere through the stack 5; At the'sides of the smoke-box, toward the top thereof, are two arc-shaped superheating chambers 6, 7, the; outer walls of which are formed by the sides of the smoke-box, The inner sidewalls are formed by the cylindrically curved sides 8, 9, of a longitudinally extending trough-shaped member havin a bottom 10, and the bottom walls of sai superheating chambers are formed by inclined plates 11,

12, extending downwardly and laterally from the lower part of the trough-shaped member to the sides of the smoke-box, as

shown. These bottom walls 11, 12, are each provided with a screened opening, as 13, located in front of the smoke-stack 5. At the rear the superheating chambers are closed by plates 14, 15, and the,v trough shaped member is closed by a forwardly inclined deflector 16 which serves to deflect downwardly the furnace gases issuing from the upper boiler-tubes. From the foregoing it Wlll be seen that the gases or products of combustion discharged bythe boiler tubes all'pass under;

, This invention relates to steam superheat-' ing apparatus for locomotive boilers, and, its chief object is to provide an eficient apparatus whereby the otherwise waste heat of the furnace gases can be utilized for su-' perheating purposes, without material, if Q the troughshaped member and between the bottom walls of the superheating chambers. Part of these gases flow to the tront of the smoke-box, where the trough-shaped mem-' her and the superheating chambers are open, as shown, and thence more or less directly to the stack in. the rearward direction. The front wall 17 of the smoke-box,

however, is comparatively close to the open front ends of the elements mentioned, thus restricting the path at this oint to such an extent that only a part of t e furnace gases can, as stated, find their way to the stack in the manner described. The rest of the gases enter the super-heating chambers through the screened openings 13, and flow thence through the su erheating chambers, which are each open att e top, to the stack 5.

The superheater is composed of two parts, each located in its respective superheating wardly from the headers are suitable superheating tubes or elements 20, preferably U- shaped, one leg of each being connected to an inlet header and the other to the adjacent outlet header. Each pair of inlet headers is connected by pipes 21 to the adjacent end of a transverse steam conduit 22, arranged in the rear of the stack and receiving steam through a supply pipe '23 from the steam space of the boilers; while each pair of outlet headers is connected by a V- shaped conduit or connecting member 24 to.

the respective engine-pipe, 25, or 26, as the case may be, by which the superheated steam is delivered to the engines, not shown.

engines by any convenient means not shown, extends up through the bottom-plate 10 into proximity to the open end of the constricted receiver 28, extending downwardly from the stack to a point below the open upper por- The exhaust-nozzle 27, connected with the 22 divides and flows through the four pipes .1. 1

21 to the four inlet headers 18 simultane ously; thencethrough the U-tubes to the four outlet headers 19, and out to the engines through the connecting members 24 and pipes 25, and 26, was engines. The fur- 1 nace gases passing under the trough-shaped members, flow in part through the-screened openings 13 into the superheater. Passing across and backward over the superheating tubes the gases flow out of the chambers downwardly over the inner chamber-Walls 8, 9, and are discharged from the stack into the atmosphere. It will be observed that the ejector action of the exhaust takes place at a point in the course of the gases which is between the superheater and the stack. In other Words the gases which enter the superheating chambers cannot reach the stack until the chambers have been completely traversed. The ejector action of the exhaust thus serves to create a positive draft-through the two sections of the superheater, so that a most effective utilization of the heat of the gases is assured. The superheating elements themselves are also so arranged as to efiectually break up the current of gases and cause a thorough distribution of the same among the said elements. Thus if there is found any tendency of the gases to flow in greater amount through one part of a chamber than another the superheating tubes may bespaced closer together in such part, thereby causing the gases to spread to other parts of the apparatus. This special spacing of the tubes will of course depend uponthe conditions of each particular case, which inturn depend upon various factors, such as the absolute and relative dimensions of the various parts, the positions of the superheating chambers, etc. 1

As previously stated, part-of the furnace gases do not flow through the superheating chambers but pass directly to the stack, entering the trough-shaped member at its open forward end. This part of the gases may be made as large or small as desired, relatively to the part flowing through the screened openings 13, by suitably proportioning the space between the front wall of the smoke-box and the front ends of the superheating-chambers and the trough-shaped members, thus diminishing or increasing the crosssectional area of the path at that point and compelling more or less of the gases to take the other course, through the openings 13 into the superheating chambers.

As previously stated, the form herein specifically illustrated is the preferred embodiment of the invention. It is to be understood, however, that other forms are permis- '.sible Without departure from the proper spirit and scope of the invention as defined by the appended claims.

' I claim:

1. In a'steam superheating apparatus for boilers of the locomotive type, the combination of a smoke box receiving the furnace gases at the rear thereof, of walls within said smoke box formingan upwardly open rearwardly closed trough shaped chamber, a.

plurality of chambers concentric with the aforesaid chamber one of which is adapted to receivethe furnace gases directly from the fines and the other adapted to receive superheating tubes therein, the walls of said concentric chambers provided with apertures toward the front thereof whereby the gases after passing into the gas chamber are dis 'tributed among the superheater elements in the superheater'chamber.

' 2. In a steam superheating apparatus for upper portion of said smoke box and substantially concentric chambers at the sides thereof, .said concentric chambers being 0 pen at the bottom and closed in the rear, superheating elements, comprising tubes located within said chambers, and means at the rear of said smoke box to cause the hot gases to flow through said chambers.

3. In a steam superheating apparatus for boilers of the locomotive type, the combination of a smoke box having a longitudinal apertured chamber in the lower part thereof adapted to receive the furnace gases as they issue from the boiler tubes, superheaterchambers closed at'the rear and located at the sides of the smoke box to receive the furnace gases from the gas chamber, and walls in said smoke box forming an upwardly open and rearwardly closed annular chamher, the opening in the upper side thereof adapted to receive the gases from the superheater chambers and the rearwardly closed end adapted to serve as a baffle to deflect the furnace gases downwardly into the gas chamber, and means for discharging the having apertures for the passage of the hot gases from the aforesaid lower chamber into the superheating ChlnlbQI'S and means within the upwardly open trough shaped chamber adapted to draw the gases through the superheating chambers.

5. In a steam superheating apparatus for lower chamber having apertures in the for-- 'ward' end thereof, an exhaust receiver extending downwardly from the smoke stack into the upper trough shaped chamber a bafile closing the rear of the upper trough, shaped chamber and deflecting the gases-into the lower trough shaped chamber, said apertures at the forward end of thewalls of the lower trough shaped chamberadap'ted to permit the passageof the hot gases into the superheating chambers,and* an exhaust nozrzle discharging-into the aforesaid receiver whereby the hot gases travel through the superheating chambers and into'the stack.

6. In a ,steam 'superheating apparatus'for boilers of the locomotive type, the combina tion of asmoke-box,-*"an upwardly open trough-shaped member extending longitudinally the smoke-box, apertured members extending between the trough-shaped member and the. smoke-box walls to form superheating chambersat-the sides of the smoke box, superheating devices in said chambers, a closure for the rear of the upwardly open trough shaped mem er, said closure forming a battle whereby the urnace gases flow under the trough shaped member toward the front of the furnace.

7. In a steam superheating apparatus for boilers of the locomotive type, the combina tion of a smoke-box having a-smoke-stack at its rear, an upwardly open rearwardly closed trough-shaped member extending longitudinally of the'smoke box, apertured plates extending between the lower portion of said member and the sides of the smoke-box, transverse plates at the rear of the smokebox closing the spaces between the trough shaped'me'mber and the sides of the smoke box, a smoke-stack on the smoke-box at the rearthereof, an exhaust receiver extending downwardly from the smoke-stack intothe trough-shaped member, an exhaust nozzle for the engine exhaust discharging into the receiver, and superheating devices in the spaces between the trough-shaped member and the of the smoke-box in front of said transverse, plates.

I In testimony whereof I aflix my signature in the presence of twosubscribing witnesses.

. JOHN riuMeosE.

Witnesses:

Lawson DYER, S. SJDUNHAM. 

